[22.04 FEAT] HSCI: Multi-MAC Support - s390-tools part

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Enhance HSCI (HiperSockets Converged Interface) with multi-MAC support and provide the corresponding tool for exploitation.

Business value: Provide improved capabilites for KVM setups on IBM Z, enhance z/OS interoperation

The initial version of HSCI supports single-MAC setups only, where only a single MAC can be registered for the HSCI. This will not work with regular Open vSwitch or MacVTap setups as used by our KVM customers, as both try to register add'l MACs for the KVM guests. And that will also precent z/OS <-> KVM co-location cases from working.

This line item will overcome this restriction. If possible, the tooling should exploit multi-MAC transparently (i.e. no add'l switch required - it's enabled all the time).

This feature request is the s390-tools contribution part.
Will be made available with s390-tools >=2.18.
Backport will be provided if needed.

Business value:
z/OS Co-location.

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2021-08-04 11:45 EDT-------
Feature will not make it in time for Impish/21.10, therefore moving to U22.04

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2022-02-12 23:04 EDT-------
The s390-tools part of this feature was made available with s390-tools v2.19 (hsci: Add support for multiple MAC addresses).
Since Jammy Jellyfish comes with s390-tools v2.20
(see Bugzilla 196184 - LP#1959420 : [22.04 FEAT] Upgrade s390utils/s390-tools to latest version), this feature should be available with jammy